package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author xindezhentu
 * @create 2023-04-04 15:10
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService {

   @Autowired
   private DishService dishService;
   @Autowired
   private SetmealService setmealService;


    /**
     * 根据Id删除分类
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        添加查询条件，根据分类id查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLambdaQueryWrapper);


//        查询当前分类是否关联了菜品
        if(count1>0){
//            抛出业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
//        查询当前分类是否关联了套餐
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        添加查询条件
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if(count2>0){
            //            抛出业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
//        正常删除
        super.removeById(id);
    }
}
